Re: Decay-In-Storage

["Sandy Perle" <sandyfl@earthlink.net>]

In my opinion this whole discussion is one that involves philosophy, 
more than technical basis. I say this because it really doesn't 
matter how many half-lives are considered, since one can do the 
calculations for as many half-lives as they deem necessary, be it 5, 
10 or 20. The real issue has to do with at what level can a facility 
still detect measurable radioactivity. That is the sole basis fro 
disposal. 

If you can detect it, you can't dispose of it, unless you meet a 
specific regulatory requirement. Unfortunately there is no BRC or 
DeMinimis value stated in the regulations. So, the issue should not 
be how many half-lives one allows material to decay, but how much do 
you have and can you dispose of it without violating any regulatory 
body.

------------------------------------------------------------------------
Sandy Perle					Tel:(714) 545-0100 / (800) 548-5100   				    	
Director, Technical				Extension 2306 				     	
ICN Worldwide Dosimetry Division		Fax:(714) 668-3149 	                   		    
ICN Biomedicals, Inc.				E-Mail: sandyfl@earthlink.net 				                           
ICN Plaza, 3300 Hyland Avenue  		E-Mail: sperle@icnpharm.com          	          
Costa Mesa, CA 92626                                      

Personal Website:  http://www.geocities.com/capecanaveral/1205
ICN Worldwide Dosimetry Website: http://www.dosimetry.com

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